171 When Abram was ninety-nine years old, God showed up and said to him, "I am The Strong God, live entirely before me, live to the hilt! 2 I'll make a covenant between us and I'll give you a huge family." 3 Overwhelmed, Abram fell flat on his face.
4 "This is my covenant with you: You'll be the father of many nations. 5 Your name will no longer be Abram, but Abraham, meaning that 'I'm making you the father of many nations.' 6 I'll make you a father of fathers - I'll make nations from you, kings will issue from you.
7 I'm establishing my covenant between me and you, a covenant that includes your descendants, a covenant that goes on and on and on, a covenant that commits me to be your God and the God of your descendants. 8 And I'm giving you and your descendants this land where you're now just camping, this whole country of Canaan, to own forever. And I'll be their God." 9 God continued to Abraham, "And you: You will honor my covenant, you and your descendants, generation after generation. 10 This is the covenant that you are to honor, the covenant that pulls in all your descendants: Circumcise every male. 11 Circumcise by cutting off the foreskin of the penis; it will be the sign of the covenant between us. 12 Every male baby will be circumcised when he is eight days old, generation after generation - this includes house-born slaves and slaves bought from outsiders who are not blood kin. 13 Make sure you circumcise both your own children and anyone brought in from the outside. That way my covenant will be cut into your body, a permanent mark of my permanent covenant. 14 An uncircumcised male, one who has not had the foreskin of his penis cut off, will be cut off from his people - he has broken my covenant."
15 God continued speaking to Abraham, "And Sarai your wife: Don't call her Sarai any longer; call her Sarah. 16 I'll bless her - yes! I'll give you a son by her! Oh, how I'll bless her! Nations will come from her; kings of nations will come from her." 17 Abraham fell flat on his face. And then he laughed, thinking, "Can a hundred-year-old man father a son? And can Sarah, at ninety years, have a baby?" 18 Recovering, Abraham said to God, "Oh, keep Ishmael alive and well before you!" 19 But God said, "That's not what I mean. Your wife, Sarah, will have a baby, a son. Name him Isaac (Laughter). I'll establish my covenant with him and his descendants, a covenant that lasts forever. 20 "And Ishmael? Yes, I heard your prayer for him. I'll also bless him; I'll make sure he has plenty of children - a huge family. He'll father twelve princes; I'll make him a great nation. 21 But I'll establish my covenant with Isaac whom Sarah will give you about this time next year."
Matthew Henry's Commentary on Genesis 17:1-21
Commentary on Genesis 17:1-6
(Read Genesis 17:1-6)
The covenant was to be accomplished in due time. The promised Seed was Christ, and Christians in him. And all who are of faith are blessed with faithful Abram, being partakers of the same covenant blessings. In token of this covenant his name was changed from Abram, "a high father," to Abraham, "the father of a multitude." All that the Christian world enjoys, it is indebted for to Abraham and his Seed.
Commentary on Genesis 17:7-14
(Read Genesis 17:7-14)
The covenant of grace is from everlasting in the counsels of it, and to everlasting in the consequences of it. The token of the covenant was circumcision. It is here said to be the covenant which Abraham and his seed must keep. Those who will have the Lord to be to them a God, must resolve to be to him a people. Not only Abraham and Isaac, and his posterity by Isaac, were to be circumcised, but also Ishmael and the bond-servants. It sealed not only the covenant of the land of Canaan to Isaac's posterity, but of heaven, through Christ, to the whole church of God. The outward sign is for the visible church; the inward seal of the Spirit is peculiar to those whom God knows to be believers, and he alone can know them. The religious observance of this institution was required, under a very severe penalty. It is dangerous to make light of Divine institutions, and to live in the neglect of them. The covenant in question was one that involved great blessings for the world in all future ages. Even the blessedness of Abraham himself, and all the rewards conferred upon him, were for Christ's sake. Abraham was justified, as we have seen, not by his own righteousness, but by faith in the promised Messiah.
Commentary on Genesis 17:15-22
(Read Genesis 17:15-22)
Here is the promise made to Abraham of a son by Sarai, in whom the promise made to him should be fulfilled. The assurance of this promise was the change of Sarai's name into Sarah. Sarai signifies my princess, as if her honour were confined to one family only; Sarah signifies a princess. The more favours God confers upon us, the more low we should be in our own eyes. Abraham showed great joy; he laughed, it was a laughter of delight, not of distrust. Now it was that Abraham rejoiced to see Christ's day; now he saw it and was glad, John 8:56. Abraham, dreading lest Ishmael should be abandoned and forsaken of God, put up a petition on his behalf. God gives us leave in prayer to be particular in making known our requests. Whatever is our care and fear, should be spread before God in prayer. It is the duty of parents to pray for their children, and the great thing we should desire is, that they may be kept in covenant with Him, and may have grace to walk before him in uprightness. Common blessings are secured to Ishmael. Outward good things are often given to those children of godly parents who are born after the flesh, for their parents' sake. Covenant blessings are reserved for Isaac, and appropriated to him.